Sole portion of a golf club head



FIG. 1 is a front perspective view of the sole portion of a golf club head of the new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a plan view thereof;

FIG. 4 is a rear side view thereof;

FIG. 5 is a front side view thereof;

FIG. 6 is an end view thereof, from the heel end of the club head; and,

FIG. 7 is an end view thereof, from the toe end of the club head.

The broken line showing of the portion of the club head is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for the sole portion of a golf club head, as shown and described. 